LG said Tuesday that it has sold more than 1 million Optimus G Pro smartphones in its home market of Korea since the device launched four months ago. It is the fastest-ever selling LG smartphone, according to LG, and has reached daily sales of more than 8,000 units.

Before the Optimus G Pro, the Optimus LTE held the record for speedy sales in Korea. The Optimus LTE took seven months to reach the 1 million mark, which means the G Pro is selling nearly twice as quickly. The G Pro is LG's phablet and mimics the Samsung Galaxy Note II in both appearance and features.

The defining characteristic of the Optimus G Pro is its display. The screen measures 5.5-inches across the diagonal and packs in 1920 x 1080 pixels. It is a full HD smartphone and is no doubt an impressive screen. LG uses in-plane switching LCD technology, which is what Apple puts in its screens. By way of comparison, Samsung uses Super AMOLED screens.

The G Pro's large screen needs some serious horsepower, and the device includes a 1.7-GHz quad-core Qualcomm Snapdragon 600 processor, which is paired with 2 GB of RAM. Other features include a 13-megapixel camera, 32 GB of storage, microSD support and a huge 3,140-mAh battery. The G Pro runs Android 4.1.2 Jelly Bean and includes many of LG's user interface customizations.

The Optimus G Pro is sold in the U.S. by AT&T. Speaking of the U.S., LG has not said how many G Pros it sold outside of Korea. If LG has sold a measurable quantity of the devices, surely it would have said so. The device has been available in the U.S. since early May.

Tuesday's news from LG tells us just how much the company struggles in the shadow of country-mate Samsung.

In stark contrast to the four-month period it took LG to sell 1 million G Pros, Samsung announced earlier this month that it shipped 10 million Galaxy S4s in just four weeks. The GS4 sold like gangbusters out of the gate, though some analysts say that sales are already slowing. To be fair, the G Pro does not compete with the GS4. Instead, it competes with the Galaxy Note II. Samsung has not shared details about how many Galaxy Note IIs it has sold.

The Note II has been available from AT&T, Sprint, T-Mobile and Verizon Wireless since late 2012. Over the first six months of 2013, the Galaxy Note II was routinely one of the top five handsets at each of those carriers. It typically ranked behind the Apple iPhone and Galaxy S III (until the GS4 went on sale in May).

Samsung does not offer a breakdown of its smartphone sales, so there can be no direct comparison among the different handsets.